EP3095607B1 - Imprimante prête pour l'impression de système de détection d'un mécanisme d'impression thermique - Google Patents

Imprimante prête pour l'impression de système de détection d'un mécanisme d'impression thermique Download PDF

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Publication number
EP3095607B1
EP3095607B1 EP15168282.0A EP15168282A EP3095607B1 EP 3095607 B1 EP3095607 B1 EP 3095607B1 EP 15168282 A EP15168282 A EP 15168282A EP 3095607 B1 EP3095607 B1 EP 3095607B1
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EP
European Patent Office
Prior art keywords
conductive
platen roller
contact
printing mechanism
thermal printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP15168282.0A
Other languages
German (de)
English (en)
Other versions
EP3095607A1 (fr
Inventor
Denis Montagutelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
APS Trading OOD
Original Assignee
APS Trading OOD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP15168282.0A priority Critical patent/EP3095607B1/fr
Application filed by APS Trading OOD filed Critical APS Trading OOD
Priority to PCT/EP2016/060409 priority patent/WO2016184722A1/fr
Priority to KR1020177029918A priority patent/KR101970425B1/ko
Priority to CN201680028542.7A priority patent/CN107635783B/zh
Priority to US15/564,643 priority patent/US10011126B2/en
Priority to RU2017134062A priority patent/RU2672960C1/ru
Publication of EP3095607A1 publication Critical patent/EP3095607A1/fr
Application granted granted Critical
Publication of EP3095607B1 publication Critical patent/EP3095607B1/fr
Priority to ZA2017/06714A priority patent/ZA201706714B/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/04—Roller platens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/14—Platen-shift mechanisms; Driving gear therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/30—Embodiments of or processes related to thermal heads
    • B41J2202/31—Thermal printer with head or platen movable

Definitions

  • the invention relates to a thermal printing mechanism.
  • a thermal printing mechanism usually comprises a chassis for holding all of the following components: a thermal printhead, a platen roller that can be put in rotation by a motor through a gear train, and pressure means in order to keep under pressure the thermal printhead against the platen roller.
  • a thermal sensitive paper is inserted between the platen roller and the thermal printhead, and the printout is generated by combining the paper advance with the dot selection and activation on the thermal printhead.
  • An improvement of such device is providing the possibility to separate the platen roller from the thermal printhead and the chassis in order to facilitate the loading of the paper and its positioning between the thermal printhead and the platen roller.
  • the platen roller has two positions: first one called the printing position, where the platen roller is held in the printer chassis and allows the printer to print, and second one - called open position wherein the platen roller is detached from the printer chassis.
  • Such arrangements of a thermal print mechanism are well known in the prior art, and described for example in FR2786727 .
  • Such devices can comprise also a sensor on the printer chassis to sense the presence of the paper.
  • a sensor on the printer chassis to sense the presence of the paper.
  • Such sensor is in most of the cases an optical reflective sensor, and in some specific cases a transmittive sensor or a micro-switch.
  • Such sensor can also be used to detect the separation of the platen roller out of the printer chassis, when the thermal printer having an easy loading system.
  • Such detection system requires an analog to digital conversion on the electronic board, moreover since the optical sensor has an important gain variation from one to another, a calibration procedure has to be done on the electronic board which measures the electrical signal coming out form the optical sensor, making this detection complex to setup and operate and not always reliable.
  • Japan patent application JP 2008 037051 discloses a printer apparatus comprising a detachable platen roller for printing paper conveyance and a conductive spindle which supports the platen roller and frame members which attachably/detachably holds the platen.
  • the frame members are electrically mutually connected by the spindle of the platen roller.
  • a switch for detecting the attachment/detachment of the platen roller is formed by the frame members and the spindle. This construction is not capable for detecting presence of the paper or problems in the printing process, such as paper jams.
  • the aim of the present invention is to simplify the printer construction by avoiding such optical sensor while providing the means to detect the printer availability to print using usual parts of the thermal printing mechanism.
  • the solution of the present invention applies indifferently for mechanism having the removable platen roller (easy-loading system) or not. This would allow keeping the overall dimensions in a desired range, simplifying the construction using fewer components and thus decreasing production costs of the device.
  • the present invention adds extra functions to the thermal printer mechanism.
  • the present invention proposes a solution by using the platen roller itself to detect the printer availability to print.
  • thermal printing mechanism comprising:
  • one of the ends of the conductive shaft interacting with one of the lateral conductive contacts has at least one nonconductive part or there is at least one nonconductive element mounted on said one end of the conductive shaft, said at least one non conductive part or said at least one nonconductive element being arranged at contact area of said one end of the conductive shaft so as that during rotation of the platen roller the respective lateral conductive contact being able to successively interact with the conductive part of said end of the shaft, providing a direct or indirect electrical contact, or with said at least one nonconductive part or element, thus successively closing and, respectively, opening electrical circuit of the switch.
  • the platen roller is usually made of a metallic shaft, so a conductive material, over which a rubber material is molded and rectified to get a precise geometrical cylinder shape which is to be pressed against the thermal printhead.
  • a conductive material over which a rubber material is molded and rectified to get a precise geometrical cylinder shape which is to be pressed against the thermal printhead.
  • the platen roller shaft is isolated along almost its entire length except for its two opposite free ends. Providing two corresponding lateral contacts on the printer chassis able to contact with the free ends of the platen roller conductive shaft and an electrical current allows detecting the presence of the platen roller in the printing position. In such arrangement the platen roller conductive shaft behaves as an electrical switch.
  • Each end of both lateral conductive contacts is connected, by any known way from the prior art, to an electrical circuit, in order to transfer the electrical signal from the switch to a device capable to register said signal.
  • the motion means are not capable to rotate the platen roller against the thermal printhead when there is no paper in between. If the paper is not present, the motion means have no enough force to make the platen roller turn due to the high friction between the thermal head and the platen roller. Thus the presence or absence of the paper can be detected.
  • the platen roller is detachable from the printer in order to facilitate the loading of the paper and its positioning between the thermal printhead and the platen roller.
  • the platen roller has two positions: first one called the printing position, where the platen roller is held in the printer chassis and allows the printer to print, and second one - called open position wherein the platen roller is detached from the printer chassis.
  • Such arrangements of a thermal printing mechanism are well known in the prior art, and described for example in FR2786727 .
  • At least one of the lateral conductive contacts is designed as pressure means for the conductive shaft so as to urge the platen roller against the thermal printhead.
  • Preferably at least one of the lateral conductive contacts is in the form of conductive spring.
  • the mechanical pressure that the lateral conductive contacts apply on the conductive shaft are requested to be high to get a good print quality, and this may lead to fast wearing of the lateral contacts or the conductive shaft when they are in direct contact with each other, since the friction between two metallic parts generates a high wearing. This is the reason why other electro-mechanical conductive elements may have to be inserted between the lateral conductive contacts and the conductive shaft's end so as to reduce the friction forces and to prevent from such wearing.
  • one of the ends of the conductive shaft is rotatably inserted in a conductive bush so as to provide continuous electrical contact between the conductive shaft and inner surface of the conductive bush.
  • the respective lateral contact having also a pressure means function is in contact with the outer surface of the bush when the platen roller is in printing position.
  • the lateral conductive contact presses the immobile bush instead of rotating conductive shaft. The mechanical wearing is then cancelled and the conductivity is still guaranteed during all the conductive shaft rotation, leading to an indirect continuous electrical contact between the lateral conductive contact and the conductive shaft.
  • a second other electro-mechanical element is inserted between the other shaft's end and the corresponding lateral conductive contact in order to generate at least one switch opening during one rotation of the conductive shaft.
  • Such electro-mechanical element comprises at least one first non-conductive part, and at least one second conductive part to indirectly electrically connect the lateral conductive contact to the conductive shaft, the lateral contact being alternatively in contact with the said first non-conductive part or with the second conductive part during one rotation of the conductive shaft.
  • the second electro-mechanical element comprises a non conductive platen roller gear, inside which at least one additional conductive element is mounted.
  • the non conductive platen roller gear is preferably made of plastic and comprises a cylindrical body on which there is a gear section and electro-mechanical contact section.
  • the platen roller gear is fixedly mounted on the conductive shaft.
  • the at least one additional conductive element is positioned inside the cylindrical body of the non conductive platen roller gear in a direction substantially parallel to the conductive shaft and with one end is in continuous electrical contact with the conductive shaft, and other end of the additional conductive element is hardly protruding out through an opening arranged at the circumferential wall of the contact section of the platen roller gear in order to contact the lateral conductive contact when the conductive shaft is rotating.
  • said at least one additional conductive element is flexible.
  • the at least one additional conductive element gets in electrical contact with the lateral conductive contact once per turn, and bends when the conductive lateral contact passes over it.
  • the mechanical contact pressure between the flexible contact and the lateral conductive contact can be kept low because it is defined by the flexibility of the flexible additional conductive element and not by the pressure of the lateral conductive contact, which is in mechanical contact with the non conductive plastic gear, keeping under control the wearing as a result of the friction between two metallic conductive parts.
  • a groove is designed in the contact part of the platen roller gear, to precisely laterally align the lateral conductive contact with the flexible contacts.
  • the pressure means comprise wire springs
  • the contact surface between such wire spring and the cylindrical surface of the platen roller gear is one point, generating a very high pressure on it, thus increasing the wearing speed.
  • the groove shape being complementary to the cross-section of the wire spring, it allows to have and half circle contact pressure arc between the platen roller gear and the wire spring drastically reducing the wearing speed.
  • the lateral conductive contact is a wire spring urging the platen roller against the thermal head via a cylindrical nonconductive plastic part, the mechanical wearing is very low.
  • the printer chassis is conductive and at least one of the lateral conductive contacts is also in contact through its second end with the printer chassis.
  • At least one of the lateral conductive contacts is in contact trough its second end with a conductive pad located on a flexible circuit.
  • the flexible circuit is in contact with one of the two lateral conductive contacts through the chassis.
  • the flexible circuit is a single side flexible circuit and is folded on itself to generate a first contact pad and a second contact pad, the first contact pad being electrically connected to the second end of the lateral conductive contacts, and the second contact pad being electrically connected to the chassis.
  • the flexible circuit has two terminals to transfer the signals from the switch to an electronic controller of the thermal printing mechanism.
  • a first terminal on the terminal area of the flexible circuit which is always connected to the chassis, whatever is the switch position, is connected to the ground on the electronic controller of the thermal printing mechanism.
  • the above disclosed configuration generates a switch opening sequence when the conductive shaft is rotating and directly or indirectly interacting with one of the lateral conductive contacts. Since the mechanical rotation of such conductive shaft is controlled by a stepper motor, there is a correspondence between the number of steps done by the stepper motor and the duty cycle of the open and close switch pulse sequence. Checking the coherency of this correspondence, it is possible to detect a loss in the motor steps due to any mechanical problem in the thermal printer mechanism. Such problems generally arise when there is a bad paper guiding or a paper jam somewhere in the printer leading generally to a print compression.
  • the advantage of the solution according to the present invention is that using usual parts of the construction provides a reliable sensor for detecting the printer availability to print.
  • the sensor according to the present invention can implement a triple sensing function: paper presence, paper jam, and platen roller position in case the platen roller is removable. This solution allows avoiding the optical sensor for paper presence detection thus simplifying the construction and reducing the production costs.
  • FIG. 1 schematically shows the thermal printing mechanism according to the present invention.
  • the thermal printing mechanism comprises a printer chassis 2; a thermal printhead 1; a platen roller 3 having a conductive shaft 6; a motion means 11 to put the platen roller 3 in rotation trough a platen roller gear 14 fixedly mounted on one end of the platen roller conductive shaft 6, a paper guide 8 and a gear train protector 10.
  • the paper guide 8 and the gear train protector 10 are nonconductive.
  • FIG. 2 shows the inner part of a preferred embodiment of the thermal printing mechanism according to the present invention.
  • the thermal printhead 1 is fixedly mounted on the conductive printer chassis 2.
  • the thermal printhead can also be assembled in a known way on a rotative support.
  • the thermal printing mechanism further comprises two lateral conductive contacts 4 and 5 arranged on the printer chassis 2 so as to be in a contact with the two opposite ends of the platen roller conductive shaft 6 in the printing position of the platen roller 3 for conducting electrical current, thus forming an electrical switch for indication of the status of the platen roller position.
  • the platen roller 3 is movable between two possible positions - open position and printing position.
  • the lateral conductive contacts 4 and 5 in this embodiment are also pressure means for the platen roller and comprise wire spring that have an angled shape part 7 at first end that interacts with conductive shaft 6, said angled shape part 7 is provided in order to create a hard point when the platen roller 4 moves from the open position to the printing position and vice-versa.
  • Said at least one non conductive part or said at least one nonconductive element being arranged at contact area of said one end of the conductive shaft 6 with respective lateral conductive contact 4 or 5, wherein said at least one nonconductive part or element generates at least one open switch pulse during one full rotation of the platen roller conductive shaft 6.
  • the non conductive element mounted on the conductive shaft comprises the nonconductive platen roller gear 14, fixedly mounted on the conductive shaft.
  • the lateral conductive contact 4 being also a pressure means for the thermal printhead, is in continuous mechanical contact with the platen roller gear 14.
  • the groove 19 guides laterally the lateral conductive contact 4 and reduces the wearing against the nonconductive platen roller gear 14, since the mechanical contact pressure is following a half circle instead of a single point.
  • two flexible additional conductive elements 15 are inserted opposite to one another into the cylindrical body of the nonconductive platen roller gear 14.
  • Each flexible conductive element 15, for example, has four sections with different function.
  • First section 15a is arranged perpendicular to the conductive shaft 6 to ease the mounting of the flexible conductive elements 15 into the platen roller gear 14, before the assembly of the platen roller gear 14 with the flexible conductive elements 15 into the conductive shaft 6.
  • Second section 15b is arranged parallel to and is in continuous electrical contact with the conductive shaft 6 through a surface 24 arranged on the conductive shaft 6.
  • Third section 15c has a reduced width to be flexible, so as to allow the flexible conductive element 15 to bend when the lateral conductive contact 4 pushes it.
  • the last forth section 15d has a hook-shaped protrusion in order to hardly protrude from an opening 13 (in the form of a slot as shown on the figure 4 ) arranged in circumferential wall of the cylindrical body of the platen roller gear 14, said forth section 15d is in intermittent electrical contact with the lateral conductive contact 4 during rotation of the conductive shaft 6.
  • the switch state With two flexible additional conductive elements 15 arranged between two nonconductive parts of the platen roller gear 14, for one full rotation of the conductive shaft 6, the switch state generates four electrical transitions, and each closed switch state corresponds to a bending of the flexible conductive element 15.
  • the mechanical force of this bending being defined by the flexible portion 15c of the flexible conductive element 15, thus the wearing of the hook-shaped protrusion 15d against the lateral conductive contact 4 is kept very low.
  • lateral conductive contact are different from the pressure means, it is also clear that a low force lateral conductive contact mounted on the chassis can be used, and the additional conductive elements may not need to be flexible, leading to a simple conductive part continuously electrically connected to the conductive shaft 6.
  • the at least one nonconductive part or at least one nonconductive element mounted on at least one end of the conductive shaft 6, may be achieved also in a different way than using the platen roller gear 14 like by filling notches on the circumferential surface of the shaft with non conductive material, applying stripes of non-conductive coating on the circumferential surface of the shaft, creating a slot in the conductive shaft and filling it with non conductive material of a part of the platen roller gear 14, or by any other way that one skilled in the art could use.
  • the partly exploded view on the figure 6 shows the mounting of the spring 5 on a nonconductive shaft 9 mounted on the nonconductive paper guide 8.
  • the conductive shaft 6 is rotatably inserted in additional conductive element comprising a conductive bush 23 so as to be in electrical contact with inner surface of the conductive bush 23.
  • the lateral conductive contact 5 having also the pressure means function is in contact with the outer surface of the immobile conductive bush 23.
  • a circlip 25 retains the conductive bush 23 on the conductive shaft 6.
  • the second end 20 of the spring 5 is in electrical and mechanical contact with the printer chassis 2.
  • the thermal printing mechanism according to the invention comprises also a single side flexible circuit 17 with a first contact pad 21 and a second contact pad 22 as sown on figures 7 and 8 .
  • the elasticity of the wire spring 4 urges its second end 16 against the first contact pad 21 on the flexible circuit 17, thus urging the second contact pad 22 on the flexible circuit 17 against the printer chassis 2 as shown on figures 3 , 7 and 8 .
  • Said wire spring 4 is mounted on a nonconductive shaft 12 arranged on a nonconductive paper guide 8 as shown on the figure 3 . This allows the wire spring 4 to be electrically isolated from the printer chassis 2.
  • Both contact pads 21 and 22 of the flexible circuit 17 correspond to both ends of the electrical switch terminals located on a terminal area 18 of the flexible circuit 17.
  • Figure 7 shows the second contact pad 22, and figure 8 shows the first contact pad 21. Finally two tracks on the flexible circuit 17, connect these two contacts to two corresponding terminals in the terminal area 18 of the flexible circuit 17 as shown on the figure 9 .
  • Said terminals could be used directly to switch on a light like a LED.
  • both terminals are connected to an electronic controller board which is processing the information coming from the switch, in order to control the printer operation.
  • said flexible circuit 17 is a single side flexible circuit, to keep its price low.
  • Two conductive pad areas are made on the flexible circuit 17, in order to generate the first contact pad 21 and the second contact pad 22, both contacts being one over the other, when the flexible circuit is folded on itself.
  • the first terminal on the terminal area 18 of the flexible circuit 17, which is always connected to the printer chassis 2 via the second contact pad 22, and this, whatever is the status of the switch, is connected to the ground on the electronic board.
  • Such connection allows to ground the printer chassis 2 for a better protection against electro-static discharge on the thermal printhead 1.
  • the second terminal is then reflecting the status of the switch, being or not connected to ground according to the status of the switch.
  • Figure 10 is an embodiment where the pressure means 29 are different elements of the construction than the lateral conductive contacts 26.
  • the function of the pressure means 29 is not only to urge the platen roller against the printhead, but also to align the platen roller to the dotline of the thermal printhead.
  • a small component of the force of the pressure means is used to urge the platen roller against two lateral alignment guides.
  • the two lateral alignment guides comprise two horizontal portions of the non conductive paper guide arranged in a direction substantially perpendicular to the thermal printhead.
  • the two lateral conductive contacts 26 are arranged on contact surfaces of said two lateral alignment guides with respective parts of the platen roller.
  • An additional conductive element 27 in continuous contact with the conductive shaft 6 is arranged on the platen roller gear 14 and generates a switch pulse when passing over the lateral conductive contact 26, every full rotation of the conductive shaft.
  • the conductive shaft 6 can be also in direct contact with the lateral conductive contact 26, thus in this embodiment the bush 23 has only the mechanical function to cancel the wearing between the pressure means 29 and the conductive shaft 6.
  • Such contacts do not need to be flexible since the components of the force of the pressure means in the direction perpendicular to these lateral conductive contacts can be kept low, and therefore such lateral conductive contacts can comprise just a conductive tape, plating or a thin metal plate in order to electrically contact directly or indirectly both ends of the conductive shaft.
  • the further connection to the flexible circuit is not shown on this figure but can be easily realized by modifying the flexible circuit shape and creating pressure point with both lateral conductive contacts in order to insure the electrical continuity of the switch.
  • Figure 11 shows another embodiment of direct contact between the conductive shaft 6 and the lateral conductive contact 4, at the platen roller gear side.
  • the conductive shaft 6 has a slot 28 which is filled by a complementary nonconductive blade which is a part of the platen roller gear 14.
  • the lateral conductive contact 4, which is flexible, can be simultaneously a pressure means.
  • the information given by the open and closed position of the switch according to the invention can be analyzed by the printer driver software as follows:
  • the lateral conductive contact 4 is in direct or indirect electrical contact with the platen roller shaft 6. And in the case the platen roller is detachable, said platen roller is in printing position.
  • the platen roller motion means 11 tries to rotate the platen roller 3 up to the position when the switch opens, but for a limited angle corresponding to the angular distance for one of the lateral contact to pass over at least one nonconductive part of or at least one nonconductive element mounted on one end of the conductive shaft 6.
  • the lateral conductive contact 4 is not in direct or indirect electrical contact with the platen roller shaft 6, or the platen roller 3 is not in printing position in the case the platen roller is detachable.
  • the platen roller motion means 11 tries to rotate the platen roller 3 up to the position when the switch closes, but for a limited angle corresponding to the angular distance for one of the lateral conductive contact 4 to get in direct or indirect electrical contact with the platen roller shaft 6
  • the synchronicity between the stepper motor steps and the switch open and close sequence is continuously checked and as soon as the synchronicity is lost, there is a paper jam, paper end, or the platen roller is not any more in the printing position in the case the platen roller is detachable.
  • the optical sensor usually used to sense the paper presence can be avoided, and replaced by the multifunctional detection system according to the present invention.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Handling Of Sheets (AREA)
  • Electronic Switches (AREA)

Claims (15)

  1. Mécanisme d'impression thermique comprenant :
    - un châssis d'imprimante (2),
    - une tête d'impression thermique (1),
    - un rouleau d'impression (3) ayant un arbre d'entraînement (6),
    - un moyen d'entraînement (11) pour mettre le rouleau d'impression (3) en rotation via une roue du rouleau d'impression (14) montée fixe à une extrémité de l'arbre d'entraînement (6) du rouleau d'impression,
    - deux contacts électriques latéraux (4, 5) disposés sur le châssis d'imprimante (2) en étant directement ou indirectement en contact électrique avec deux extrémités opposées de l'arbre d'entraînement (6) du rouleau d'impression pour l'acheminement d'un courant électrique, formant ainsi un interrupteur électrique,
    caractérisé en ce que l'une des extrémités de l'arbre d'entraînement (6) coopérant avec l'un des contacts électriques latéraux (4, 5), a au moins une partie non conductrice ou il y a au moins un élément non conducteur monté sur ladite une extrémité de l'arbre d'entraînement (6), ladite au moins une partie non conductrice ou ledit au moins un élément non conducteur étant disposé à une zone de contact de ladite extrémité de l'arbre d'entraînement (6), de sorte que pendant la rotation du rouleau d'impression (3) le contact électrique latéral correspondant (4, 5) est apte à interagir successivement avec la zone conductrice de ladite extrémité de l'arbre (6) procurant un contact électrique direct ou indirect, ou avec ladite au moins une partie non conductrice ou élément, ce qui successivement ferme et, respectivement, ouvre le circuit électrique dudit interrupteur électrique.
  2. Mécanisme d'impression thermique selon la revendication 1, dans lequel le moyen d'entraînement (11) n'est pas apte à faire tourner le rouleau d'impression (3) contre la tête d'impression thermique (1) en l'absence de papier entre eux.
  3. Mécanisme d'impression thermique selon la revendication 1 ou 2, dans lequel le rouleau d'impression (3) est configuré pour être détachable du châssis d'imprimante (2) et déplaçable entre deux positions possibles, dont une première position d'impression dans laquelle le rouleau d'impression (3) est porté par le châssis d'imprimante (2) et autorise le mécanisme d'impression thermique à imprimer, et une seconde position ouverte dans laquelle le rouleau d'impression (3) est détaché du châssis d'imprimante (2).
  4. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel ledit élément non conducteur comprend une partie non conductrice de la roue du rouleau d'impression (14) qui est montée à une extrémité de l'arbre d'entraînement (6).
  5. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel entre au moins l'une des extrémités de l'arbre d'entraînement (6) et un contact électrique latéral (4, 5), il est disposé au moins un élément additionnel conducteur pour un acheminement du courant électrique entre l'arbre d'entraînement (6) et ledit contact électrique latéral (4, 5), ledit au moins un élément additionnel conducteur étant configuré de manière à éliminer les forces de friction entre le contact électrique latéral (4, 5) et l'arbre d'entraînement (6) en rotation.
  6. Mécanisme d'impression thermique selon la revendication 5, dans lequel ledit élément additionnel conducteur comprend une brosse conductrice (23) montée tournante à au moins une extrémité de l'arbre d'entraînement (6), de sorte qu'un contact électrique est procuré entre l'arbre d'entraînement (6) et la surface intérieure de la brosse conductrice (23), et dans lequel le contact électrique latéral (5) correspondant est disposé de manière à être en contact électrique avec la surface extérieure de la brosse conductrice (23).
  7. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel l'un au moins des contacts électriques latéraux (4, 5) est conformé en ressort conducteur.
  8. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel l'un au moins des contacts électriques latéraux (4, 5) est configuré comme un moyen de pression pour l'arbre d'entraînement (6), de manière à pousser le rouleau d'impression (3) contre la tête d'impression thermique (1).
  9. Mécanisme d'impression thermique selon la revendication 8, dans lequel un contact électrique latéral (4) est en contact mécaniquement continu avec la roue non conductrice du rouleau d'impression (14), pour pousser le rouleau d'impression (3) contre la tête d'impression (1), et dans lequel le dit contact électrique latéral (4) est un contact électrique intermittent avec au moins un élément additionnel conducteur (15) disposé sur la roue non conductrice du rouleau d'impression (14), de manière à être en contact électrique continu avec l'arbre d'entraînement (6).
  10. Mécanisme d'impression thermique selon la revendication 9, dans lequel au moins un élément additionnel conducteur (15) est flexible et est positionné à l'intérieur d'un corps cylindrique de la roue non conductrice du rouleau d'impression (14), en ayant une extrémité (15b) qui est en contact électrique continu avec l'arbre d'entraînement (6) et une autre extrémité (15d) disposée de manière saillante à travers une ouverture (13) respective ménagée dans une paroi circonférentielle dudit corps cylindrique de la roue non conductrice du rouleau d'impression (14), et de manière à fléchir en cas de contact électrique intermittent avec le contact conducteur latéral correspondant (4) pendant la rotation de l'arbre d'entraînement (6).
  11. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel le châssis d'imprimante (2) est conducteur et dans lequel au moins l'un des contacts électriques latéraux (4, 5) est aussi en contact via sa deuxième extrémité avec le châssis d'imprimante (2).
  12. Mécanisme d'impression thermique selon l'une quelconque des revendications précédentes, dans lequel au moins l'un des contacts électriques latéraux est en contact via sa deuxième extrémité (16) avec un revêtement conducteur situé sur un circuit flexible (17).
  13. Mécanisme d'impression thermique selon la revendication 12, dans lequel le circuit flexible (17) est en contact avec l'un des deux contacts électriques latéraux (4, 5) via le châssis d'imprimante (2).
  14. Mécanisme d'impression thermique selon les revendications 12 ou 13, dans lequel le circuit flexible (17) est un circuit flexible à simple face et est replié sur lui-même pour former un premier revêtement de contact (21) et un second revêtement de contact (22), le premier revêtement de contact (21) étant électriquement relié à la deuxième extrémité d'un contact électrique latéral (4, 5), and le second revêtement de contact (2) étant électriquement relié au châssis d'imprimante (2).
  15. Mécanisme d'impression thermique selon l'une quelconque des revendications 12, 13 et 14, dans lequel le circuit flexible (17) a deux bouts dans une zone terminale (18) du circuit flexible pour transmettre les signaux depuis l'interrupteur vers un contrôleur électronique du mécanisme d'impression thermique, et dans lequel un premier bout de la zone terminale (18) du circuit flexible (17), qui est toujours relié au châssis d'imprimante (2) dans toutes les positions de l'interrupteur, est relié à la masse du contrôleur électronique du mécanisme d'impression thermique.
EP15168282.0A 2015-05-19 2015-05-19 Imprimante prête pour l'impression de système de détection d'un mécanisme d'impression thermique Not-in-force EP3095607B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP15168282.0A EP3095607B1 (fr) 2015-05-19 2015-05-19 Imprimante prête pour l'impression de système de détection d'un mécanisme d'impression thermique
KR1020177029918A KR101970425B1 (ko) 2015-05-19 2016-05-10 열전사 프린팅 기구를 위한 검출 시스템을 인쇄할 준비가 된 프린터
CN201680028542.7A CN107635783B (zh) 2015-05-19 2016-05-10 用于热敏打印机构的准备打印检测系统
US15/564,643 US10011126B2 (en) 2015-05-19 2016-05-10 Printer ready to print detection system for a thermal printing mechanism
PCT/EP2016/060409 WO2016184722A1 (fr) 2015-05-19 2016-05-10 Système de détection d'imprimante prête à imprimer pour un mécanisme d'impression thermique
RU2017134062A RU2672960C1 (ru) 2015-05-19 2016-05-10 Механизм термопечати с системой определения готовности принтера
ZA2017/06714A ZA201706714B (en) 2015-05-19 2017-10-05 Printer ready to print detection system for a thermal printing mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15168282.0A EP3095607B1 (fr) 2015-05-19 2015-05-19 Imprimante prête pour l'impression de système de détection d'un mécanisme d'impression thermique

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EP3095607B1 true EP3095607B1 (fr) 2017-09-13

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EP (1) EP3095607B1 (fr)
KR (1) KR101970425B1 (fr)
CN (1) CN107635783B (fr)
RU (1) RU2672960C1 (fr)
WO (1) WO2016184722A1 (fr)
ZA (1) ZA201706714B (fr)

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EP3566876B1 (fr) * 2018-05-08 2020-08-26 APS Trading OOD Mécanisme d'impression thermique compact
CN110126476B (zh) * 2019-06-17 2024-02-09 珠海趣印科技有限公司 一种高精度热敏打印机机芯

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JP3309038B2 (ja) * 1995-09-29 2002-07-29 アンリツ株式会社 サーマルヘッド保持構造
FR2786727B1 (fr) 1998-12-02 2001-06-01 A P S Engineering Dispositif d'impression thermique a fermeture rapide
FR2796001B1 (fr) * 1999-07-09 2001-10-05 A P S Engineering Dispositif de deverrouillage d'un compartiment d'un mecanisme ouvrant
JP5108072B2 (ja) * 2005-06-22 2012-12-26 富士通コンポーネント株式会社 印字装置
JP4690135B2 (ja) * 2005-06-22 2011-06-01 富士通コンポーネント株式会社 印字装置
JP4819536B2 (ja) * 2006-03-15 2011-11-24 キヤノン株式会社 カセットおよびプリンタ
JP2008037051A (ja) * 2006-08-09 2008-02-21 Fujitsu Component Ltd プリンタ装置
FR2943946B1 (fr) * 2009-04-02 2011-05-06 Aps Engineering Dispositif de detection de couple, imprimante et procede de fonctionnement
JP6013235B2 (ja) * 2013-03-06 2016-10-25 富士フイルム株式会社 電子カセッテ

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KR20170131507A (ko) 2017-11-29
KR101970425B1 (ko) 2019-04-18
WO2016184722A1 (fr) 2016-11-24
RU2672960C1 (ru) 2018-11-21
ZA201706714B (en) 2019-02-27
CN107635783B (zh) 2019-07-16
US20180079230A1 (en) 2018-03-22
US10011126B2 (en) 2018-07-03
CN107635783A (zh) 2018-01-26
EP3095607A1 (fr) 2016-11-23

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